kerberos5_auth.php

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<?php
class Kerberos5Auth implements AuthInterface {

        private $filename;

        private $server;

        private $username;

        private $password;

        private $resource;

        public function __construct($auth, $extra_args){

                if(!extension_loaded("kadm5")){
                        throw new KumbiaException("Debe cargar la extensión de php llamada kadm5");
                }

                foreach(array('server', 'username', 'principal', 'password') as $param){
                        if(isset($extra_args[$param])){
                                $this->$param = $extra_args[$param];
                        } else {
                                throw new KumbiaException("Debe especificar el parámetro '$param' en los parámetros");
                        }
                }
        }

        public function get_identity(){
                if(!$this->resource){
                        new KumbiaException("La conexión al servidor kerberos5 es inválida");
                }
                $identity = array("username" => $this->username, "realm" => $this->username);
                return $identity;
        }

        public function authenticate(){
                $this->resource = kadm5_init_with_password($this->server, $this->realm, $this->principal, $this->password);
                if($this->resource===false){
                        return false;
                } else {
                        return true;
                }
        }

        public function get_principals(){
                if(!$this->resource){
                        new KumbiaException("La conexión al servidor kerberos5 es inválida");
                }
                return kadm5_get_principals($this->resource);
        }

        public function get_policies(){
                if(!$this->resource){
                        new KumbiaException("La conexión al servidor kerberos5 es inválida");
                }
                return kadm5_get_policies($this->resource);
        }

        public function __destruct(){
                if($this->resource){
                        kadm5_destroy($this->resource);
                }
        }

        public function set_params($extra_args){
                foreach(array('server', 'principal', 'username', 'password') as $param){
                        if(isset($extra_args[$param])){
                                $this->$param = $extra_args[$param];
                        }
                }
        }

}